Java port maintainers: What should be installed on the buildbot workers?

[Michael]

On 2018-02-24, at 5:57 AM, Clemens Lang <cal at macports.org> wrote:
> Overall, I think we should install JDK 8 where possible. If we need
> compatibility with older versions, we should make sure to pass -target
> 1.7 when compiling.

And -target 1.5 or 1.5 machines :-).
(seriously, I have to bring one back to life ... It is nice to know there is a build bot for this machine.)

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